ABB SACE Emax 2 Instructions Manual page 18

Neutral Protection Neutral protection is used to characterize protections L, S and I differently on the neutral phase.
T Protection T protection protects against abnormal temperatures measured and transmitted to the sensor inside the
Other protections The Iinst, Harmonic distortion, Hardware trip and Current threshold protections are described in detail in
16 | © 2023 ABB | 1SDH001316R1002 - ECN000297030
Represented as a percentage, it defines the multiplication factor applied to the tripping thresholds of the
protections (example: 50% = the tripping threshold of the neutral is half the phase threshold).
The protection is available with the 4P and 3P + N configuration; the configuration parameters can be
accessed via the Settings menu
NOTE: the Trip unit will not accept changes to the thresholds of protection L (I1) and of the
Neutral (InN) unless the following limtation is complied with: (I1 x InN) ≤ Iu; Iu is the size of
the circuit-breaker
WARNING! With 150% and 200% threshold; if the measured neutral current exceeds 16In,
the Trip unit resets the protection to 100% by itself
unit; temperature verification is always active and includes three operating states:
State Temperature range [°C]
Standard -25 < t < 70
Warnings -40 < t < -25 or 70 < t < 85
Alarm t < -40 or t > 85
(1) with Ekip Touch, the display remains on within range: -20°C / +70°C; with Ekip LCD, the display
remains on within range: -30°C / +80°C
All protections enabled in the unit are active in all operating states.
the manual 1SDH001330R1002.
Ekip Touch actions
Normal operation; display state depending on type
Warning led @ 0.5 Hz; display state depending on type
(1)
Display off; Alarm and Warning leds @ 2 Hz; TRIP if
Trip enable is activated
ABB | SACE Emax 2
(1)
Continued on the next page
Protections
2 - Standard Protections